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IEC 62153-4-10
Edition 2.0 2015-11
INTERNATIONAL
STANDARD
colour
inside
Metallic communication cable test methods –
Part 4-10: Electromagnetic compatibility (EMC) – Transfer impedance and
screening attenuation of feed-throughs and electromagnetic gaskets – Double
coaxial test method
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IEC 62153-4-10
Edition 2.0 2015-11
INTERNATIONAL
STANDARD
colour
inside
Metallic communication cable test methods –
Part 4-10: Electromagnetic compatibility (EMC) – Transfer impedance and
screening attenuation of feed-throughs and electromagnetic gaskets – Double
coaxial test method
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.100; 33.120.10 ISBN 978-2-8322-2993-4
– 2 – IEC 62153-4-10:2015 IEC 2015
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Principle of the test method . 9
5 Procedure . 12
5.1 Equipment . 12
5.2 Dynamic range . 12
5.3 Verification of the test set-up . 12
5.4 Sample preparation . 12
6 Measurement . 12
6.1 General . 12
6.2 Screening attenuation . 12
6.3 Transfer impedance . 12
7 Expression of results . 13
7.1 Transfer impedance . 13
7.2 Screening attenuation . 13
7.3 Requirements . 13
Annex A (informative) Background for the measurement of the shielding effectiveness
of feed-throughs and electromagnetic gaskets . 14
A.1 General . 14
A.2 Theoretical model of the test procedure . 15
A.3 Performing measurements . 16
A.3.1 Characteristic impedance uniformity of the test fixture . 16
A.3.2 Measuring EMI-gaskets by using a NWA . 16
A.3.3 Pictures and measurement results . 17
Annex B (informative) Reference device for verification measurement . 23
B.1 General . 23
B.2 Design of the reference device . 23
B.3 Verification measurement result . 24
Annex C (informative) Impact of ground loops on low frequency measurements . 25
C.1 General . 25
C.2 Analysis of the test set-up . 25
Bibliography . 28
Figure 1 – A two-port . 7
Figure 2 – Equivalent circuit of the test set-up and definition of Z . 7
T
Figure 3 – Cross-section of a typical feed-through configuration . 10
Figure 4 – Cross-section of the test fixture with a connector . 10
Figure 5 – Cross-section of the test fixture with an electromagnetic gasket . 11
Figure A.1 – Cross-section of a typical feed-through configuration . 14
Figure A.2 – Cross-section of the test fixture with a connector . 15
Figure A.3 – Equivalent circuit of the test setup with the shunt admittance y of the
feed-through . 15
Figure A.4 – TDR step response at input-port of test fixture . 16
Figure A.5 – View of the test fixture connected to a network analyzer . 18
Figure A.6 – Top view of the test fixture . 18
Figure A.7 – Detailed view of the contact area . 18
Figure A.8 – Detailed view of the captivation for the conductive O-ring test. 19
Figure A.9 – Isolation of the network analyzer . 20
Figure A.10 – Isolation of the test fixture when characterizing an ideal short (metal
plate) . 20
Figure A.11 – Measured operational screening transmission when characterizing a
typical conductive O-ring. 21
Figure A.12 – Transfer impedance Z of a typical conductive O-ring . 21
T
Figure A.13 – Screening attenuation a of a typical conductive O-ring . 22
s
Figure B.1 – Reference device, e.g. resistors soldered onto a PCB . 23
Figure B.2 – Typical verification measurement result . 24
Figure C.1 – Double coaxial test set-up . 25
Figure C.2 – Equivalent circuits of the double coaxial test set-up . 26
Figure C.3 – Results obtained with (green) and without ferrites on the test leads (blue) . 27
– 4 – IEC 62153-4-10:2015 IEC 2015
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
METALLIC COMMUNICATION CABLE TEST METHODS –
Part 4-10: Electromagnetic compatibility (EMC) – Transfer impedance
and screening attenuation of feed-throughs and electromagnetic
gaskets – Double coaxial test method
FOREWORD
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International Standard IEC 62153-4-10 has been prepared by IEC technical committee 46:
Cables, wires, waveguides, R.F. connectors, R.F. and microwave passive components and
accessories.
This second ed
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